大约有 45,000 项符合查询结果（耗时：0.0642秒） [XML]
Regular expression to allow spaces between words
I want a regular expression that prevents symbols and only allows letters and numbers. The regex below works great, but it doesn't allow for spaces between words.
...
How do I switch to another subversion branch in Intellij?
...
Right because here you are "updating" your sandbox to a new branch.
– Shaun F
Oct 21 '09 at 0:47
52
...
If strings are immutable in .NET, then why does Substring take O(n) time?
... liked this question so much, I just blogged it. See Strings, immutability and persistence
The short answer is: O(n) is O(1) if n does not grow large. Most people extract tiny substrings from tiny strings, so how the complexity grows asymptotically is completely irrelevant.
The long answer is:
...
How to ignore certain files in Git
...racked before (by git add). Run git reset name_of_file to unstage the file and keep it. In case you want to also remove the given file from the repository (after pushing), use git rm --cached name_of_file.
share
|
...
Convert a float64 to an int in Go
... a string. I know I can use fmt.Sprintf to convert anything to a string, and then strconv it to the data type I need, but this extra conversion seems a bit clumsy - is there a better way to do this?
...
How do I create a self-signed certificate for code signing on Windows?
...2, Windows Server 2012 R2, or Windows 8.1 then MakeCert is now deprecated, and Microsoft recommends using the PowerShell Cmdlet New-SelfSignedCertificate.
If you're using an older version such as Windows 7, you'll need to stick with MakeCert or another solution. Some people suggest the Public Key I...
grant remote access of MySQL database from any IP address
I am aware of this command:
21 Answers
21
...
Why do we need virtual functions in C++?
I'm learning C++ and I'm just getting into virtual functions.
26 Answers
26
...
How to get an outline view in sublime texteditor?
... happens when I press ctrl-r. I have a php file open. Can I locate the command in a menu? Does this work without a plugin? karlthorwald
– user89021
Feb 6 '10 at 3:34
6
...
Can't create handler inside thread that has not called Looper.prepare()
...You're calling it from a worker thread. You need to call Toast.makeText() (and most other functions dealing with the UI) from within the main thread. You could use a handler, for example.
Look up Communicating with the UI Thread in the documentation. In a nutshell:
// Set this up in the UI thread....